Documentation fixes

src/Sync/FileMutex.php

@@ -11,13 +11,13 @@ use Icicle\Coroutine;
  * system's implementation of file creation operations. Use this implementation
  * only if no other mutex types are available.
  *
- * This implementation avoids using [flock()](http://php.net/manual/en/function.fopen.php)
+ * This implementation avoids using [flock()](http://php.net/flock)
  * because flock() is known to have some atomicity issues on some systems. In
  * addition, flock() does not work as expected when trying to lock a file
  * multiple times in the same process on Linux. Instead, exclusive file creation
  * is used to create a lock file, which is atomic on most systems.
  *
- * @see http://php.net/manual/en/function.fopen.php
+ * @see http://php.net/fopen
  */
 class FileMutex implements MutexInterface
 {

src/Sync/SemaphoreInterface.php

@@ -29,7 +29,7 @@ interface SemaphoreInterface extends \Countable
      *
      * Acquires a lock from the semaphore asynchronously.
      *
-     * If there are one or more locks available, this function resolve imsmediately with a lock and the lock count is
+     * If there are one or more locks available, this function resolves immediately with a lock and the lock count is
      * decreased. If no locks are available, the semaphore waits asynchronously for a lock to become available.
      *
      * @return \Generator Resolves with a lock object when the acquire is successful.